192.168.1.1 goes to my (Beetel) modem.
I'm unable to figure out how to access my router when I'm on wifi. Only if I disconnect the router from the modem, and then connect my laptop to the router via LAN, can I access my D-Link router.
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Check your router's settings. Several models have an option to enable/disable access by wireless clients (for security reasons).
Edit: with "access" I mean access to the router settings/configuration options.